NEC MH4500 manual Installing Option Boards

!CAUTION

To avoid damage to the memory module, you must support the module until it is correctly inserted and firmly seated in its connector on the system board.

2.Hold the memory module by its edges and align it with the guide rail at the back of the electronics bay.

3.Insert the memory module through the guide rails and into the connector on the system board.

4.Firmly seat the memory module in the connector.

5.Reinstall the foam cover on the electronics bay and the access cover.

Installing Option Boards

The following paragraphs describes how to install and remove ISA and PCI option boards. The system board has one ISA bus expansion connector and seven PCI bus expansion connectors (see the following figure).

The 32-bit PCI bus is divided into PCI Segment A and PCI Segment B, each with the following connectors:

TPCI A has three expansion board connectors (PCI A1, A2, and A3) PCI B has four expansion board connectors (PCI B0, B1, B2, and B3).

The ISA connector accepts a half-length board only, and is shared with PCI B3 (meaning that you can install either an ISA board or a PCI board in the shared slot). PCI connector PCI A1, adjacent to the processors, accepts a half-length board only. The remaining PCI connectors accept up to full length boards.

The segmented high-performance PCI buses allow use of networking technology, such as 100 MB/second Ethernet NICs, with a minimum of effort and without concern for I/O bottlenecks. Each segmented bus offers up to 133 MB/second burst transfers.

Upgrading Your System 4-19